Motor-plow.



U. PAVESI & G. TOLOTTI. MOTOR PLOW.

APPLICATION FILED IAN.23,1912.

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THE COLUMBIA PumonRAm-x co WASHINGTON, L c

U. PAVES! & G. TOLOTTI.

MOTOR PLOW.

APPLICATION FILED JAN. 23. I912.

1,169,56. Patented Jan. 25, 1916.

4 SHEETS-SHEET 2.

24 i I W I8 I I g I I9 l9 I WlTNESSESz' 'rrIB COLUMBIA PLANOGRAPH co..WASHINGTON, n.

U. PAVES! & G. TOLOTTI.

MOTOR PLOW.

APPLlCATlON FILED mu. 23, 1912.

1,169,564, Patented Jan. 25, 1916.

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' I ENTORS:

By A

THE COLUMBIA PLANOGRAPH co-. WASHINGTON, D. c.

WIT SSES:

U. PAVESI & G. TOLOTTI.

MOTOR PLOW.

APPLICATION FILED JAN. 23. 1912.

Patented Jan. 25, 1916.

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UGO PAVESI AND GIULIO TOLOTTI, OF TURIN, ITALY, ASSIGNORS, BY MESNEASSIGN- MENTS, TO A. M. LEONI MANUFACTURING COMPANY, OF PHILADELPHIA,PENN- SYLVANIA, A CORPORATION OF DELAWARE.

MOTOR-PLOW.

Specification of Letters Patent.

Patented Jan. 25, 1916.

To all whom it may concern Be it known that we, Uoo PAVESI and GiULroTOLOTTI, subjects of the King of Italy, both residing at Turin, Italy,have invented certain new and useful Improvements in and Relating toMotor-Flows, of which the following is a full, clear, and exactspecification.

This invention relates to motor driven machines such as are used forplowing purposes. Such plows usually embody one or more traction wheelswhich grip the ground and produce the traction effect for forcing theplow shares through the soil. As the resistance of the earth to the plowis very high, a very high tractive effect is required. Ordinarily, thiswould necessitate a great weight on the traction wheel to preventslipping and this would in turn necessitate a heavy weight plow andrelatively high horse-power for the motor. By our invention we improvethe tractive effect of the wheel and, at the same time, make it so thatits efliciency is not directly dependent upon great weight being placedupon it. In this way we are enabled to make the plow and motor lighterand thus reduce the original cost of the plow and also the cost ofoperation.

A principal object of our invention is to effect these results whileimproving the tractive effect of the traction wheel.

The invention consists in the general combination and arrangement ofparts hereinafter described, all of which contribute to produce anefficient device.

A preferred embodiment of our invention will be particularly describedin the following specification, while the broad scope of our inventionwill be pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of a plow embodying ourinvention. Fig. 2 is a plan of the plow illustrated in Fig. 1. Fig. 3 isa front elevation of the traction wheel, a portionof which is shown incross section, together with continuous parts. Fig. 4 is a sideelevation partly diadepth of the furrow and also the steering mechanism.

In the preferred form of the invention, the frame rests on three wheels1, 2 and 3, of which 1 is the steering wheel, 2 the drivlng wheel,whilewheel 3 serves only as a guiding wheel. The wheel 2 runs in thefurrow made in the earth by one of the shares while the wheels 1 and 3always run on the surface of the ground. By this means the advantage isattained that the wheels never run on the tilled ground. The wheel 1 mayserve to determine the depth of the furrow and may be adjusted by meansof the screw 4 and wheels 5, a second screw 6, the shaft 7 and thefriction clutch 8. This clutch is able to rotate in either directionwhen pressed by the lever 9 against one or the other of the frictiondisks 10 and 11 driven by the motor. The wheel 1 serves as the steeringwheel for the plow and is adustable by means of the worm wheel 12, theworm 13 and the hand wheel 14. The wheel 3 is preferably adjustable bythe lever '15 (Figs. 1 and 2) so as to cooperate with wheel 1 to holdthe plow frame upright. The driving wheel 2 is preferably driven by themotor 16 through sprocket wheels 2 and chains 2 or an appropriate gearwheel transmission, which should be reversible.

The tractive effect of wheel 2 produces the movement of the plow and tothis end this wheel comprises a hub 19 mounted on some suitable shaft oraxle 19. The rim 17 of this wheel is connected to the hub in anysuitable manner, as for example by spokes or by side plates or framessuch as indicated at 17 Pivotally mounted on the rim 17 between the sideplates or frames 17 are the levers 18 which as shown have spade likeextensions or tractor blades 18 formed integral therewith andsubstantially perpendl l r o- Tlicse levers and blades the earth to adepth substantiallyfequal' to their length; The tractor.bladesjtherefore do not displace the soil to any appreciable extent andact merely as a cutting tool in penetrating the earth. Thus they retaintheir maximum efliciency as tractors and tend to keep the driving wheelat a substantially uniform level, since they do not displace the earthand moist'soil is unlikely to cling to them. As the wheel rotates thesetractors, 18 penetrate into the earth and give the plow. a good hold onthe ground; and they are arranged ,in such a way that they exert arearward pressure on the ground be- 20 hind. them without tending to digit up, and loosen it. In order to accomplish this, we mount the tractorsso that they virtually 1 standstill whenin contact with the groundexcept for the entering and withdrawing movement; that is each tractorpenetrates the ground-bya substantially straight clownward thrust in'itsown-plane. Thisefi'ect ispreferably accomplished by means of aneccentric 20 fixed on shaft 19 which is held 'in. ;the']f rajn1e fixedrelatiyely" to the wheel, and carries la.looseeccentric strap 20%vhichimpart-smovem'ent to a plurality of rods or links 2 whichfare attachedrespectively to the-tractors. These are movably mounted'on thewheel andare preferably pivoted topthe wheelgrim so that they can be swung in orout of the links 21.

',:l/Vli'en the wheel 2 rotates the tractors as- .sume differentpositions (Fig. 4) andare 40 movedqby thelinks in'such a manner that jthe rotation whichthey have'on account of the movement ofthe wheel, iscompensated for by gradually swinging the tractors on their :pivots, andin this way instead of in- .45 .clining. toward the front or rearnearthe *rgrouhd, 'they'are made to move "downin substantially fixed planeand penetrate to adepth in the earth at their lower or cutting edges;rand furthermore, while inserted or so'iwit'hdrawing from the ground,they are maintained substantially vertical, and do notrtilt or move soas to vdisturb the earth behind themf The tractors also leave the groundby a substantially vertical move- -ment, that. is, they maintainthemselves in a substantially fixed plane of movement.

By. this means an additional advantage is attained, consisting in this,that as these members do not have any positive movement eojin a front orrear direction when in the ground,nouselesswork is performed, and

.a v'eryf economic as. well as very efficient tract ve eifect results.

road wheel. the members 18 are brought into the position indicated inbroken -l1nes by.

means of a handle-2 L, whiclradju sts the shaft19 toa newpositionwhichdraws in the tractors 18 at the underside of the wheel; I v

The driving wheel is adjustable on its shaft according to the work ofthe shares so that the middle planes of the wheel can always beset inthe middle of the resistance 7 of the plow. (Fig.

The implements serving for working the ground, which may be of theordinary construction, are secured 'to 'a' second 1101 1- zontallyadjustable'fra1ne25. As shown in Fig. 2, thea'djustment of this framearound apoint 26 is effected by jmeansof'. alever 27, agear wheel 28'and"a rack 12%). The direction in which the plo vvijoi"thesharesoperate can be altered andthe furrows formed maybe either straight orcurved. Nefconsider that a traction wheel secures tractive effect asdescribed, or more efficient than wheels for this'purpose whiclrmerclyengage the upper surface" of theground. Andsucha wheel as'wejdiscl'oseiis p'a'r't larly effectivefwhen runningin furrow because the "tractorsare "'operatinght'o" a greater, depth in the earth and where theearth'is denser andmore resistant.

It is understood that the embodiment of the invention described'above isonlyon'e of the many embodiments or forms the invention may take, and wedo not wish' to be limited in the practice of the inventionn'or intheclaimsto the particular embodiment set forth. v 'Having.thus'd'escribed ourinvent-ion,wl1at we claim is:'' i

1. In atraction wheel the combination members rigidly 'fconnecting' thehub and run, a plurality of levers pivotaj'lly mounted on said rim, asharpened blade integral with .of"an'axl'e','a hub mountedthereon,a rim,

and substantially perpendicular to each of said levers, an eccentricmounted on the axle,

a strap encircling the eccentric and links connecting the levers to thestrap, whereby the successive blades normally enter and leave the.ground in a substantially vertical.

plurality of levers pivotally 1nounted"on said rim, asharpened bladeintegral with and substantially perpendicular to each of sa d layers, aneccentr c mounted on; the-axle, a strap encircling theeccentrldandprovided with an arm operatively connected signed our namesin the presence of two with the run to cause the strap and run tosubscribing Witnesses.

rotate together and links connecting the UGO PAVESI. levers to the strapwhereby the successive GIULIO TOLOTTL 5 blades normally enter the groundin a sub- Witnesses:

stantially vertical plane. PIERO GIAEROLIO,

In Witness whereof We have hereunto GIULIO BARZETTO.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

